Re: does dml operations load the blocks to the shared buffers ?

. Lets assume the amount of data I insert is bigger than the
shared_buffers. I didnt commit the transaction yet, the data will be saved
on temp files until I commit ?
What happens if I have in my transaction,I did a lot of changes and I
filled the wal_buffers / shared buffers but I still didnt commit. How the
database will handle it ?

‫בתאריך יום ה׳, 10 בינו׳ 2019 ב-10:55 מאת ‪Guillaume Lelarge‬‏ <‪
guillaume(at)lelarge(dot)info‬‏>:‬

> Le jeu. 10 janv. 2019 à 09:07, Mariel Cherkassky <
> mariel(dot)cherkassky(at)gmail(dot)com> a écrit :
>
>> Hey,
>> It is clear that when we query some data, if that data isnt in the shared
>> buffers pg will go bring the relevant blocks from the disk to the shared
>> buffers. I wanted to ask if the same logic works with
>> dml(insert/update/delete). I'm familiar with the writing logic, that the
>> checkpointer is the process that writing the data changes into the data
>> files during every checkpoint and that the commit write the changes from
>> the wal buffers to to the wal files. I wanted to ask about a situation
>> where we run dmls and that data isnt available in the shared buffers.
>>
>>
> It works the same.
>
>
> --
> Guillaume.
>